Data commit

Task/Sum-of-squares/Python/sum-of-squares-1.py

@@ -0,0 +1,5 @@
+sum(x * x for x in [1, 2, 3, 4, 5])
+# or
+sum(x ** 2 for x in [1, 2, 3, 4, 5])
+# or
+sum(pow(x, 2) for x in [1, 2, 3, 4, 5])

Task/Sum-of-squares/Python/sum-of-squares-2.py

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+# using lambda and map:
+sum(map(lambda x: x * x, [1, 2, 3, 4, 5]))
+# or
+sum(map(lambda x: x ** 2, [1, 2, 3, 4, 5]))
+# or
+sum(map(lambda x: pow(x, 2), [1, 2, 3, 4, 5]))
+
+# using pow and repeat
+from itertools import repeat
+sum(map(pow, [1, 2, 3, 4, 5], repeat(2)))
+
+# using starmap and mul
+from itertools import starmap
+from operator import mul
+a = [1, 2, 3, 4, 5]
+sum(starmap(mul, zip(a, a)))
+
+# using reduce
+from functools import reduce
+powers_of_two = (x * x for x in [1, 2, 3, 4, 5])
+reduce(lambda x, y : x + y, powers_of_two)
+# or
+from operator import add
+powers_of_two = (x * x for x in [1, 2, 3, 4, 5])
+reduce(add, powers_of_two)
+# or using a bit more complex lambda
+reduce(lambda a, x: a + x*x, [1, 2, 3, 4, 5])

Task/Sum-of-squares/Python/sum-of-squares-3.py

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+import numpy as np
+a = np.array([1, 2, 3, 4, 5])
+np.sum(a ** 2)